Determine the Constant of Variation for the Stated Condition

Multiple Choice

Determine the constant of variation for the stated condition.
-The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 2 hours and uses 30 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 3 hours.

A) 45 gallons
B) 6 gallons
C) 48 gallons
D) 60 gallons